The data field in CAN-FD frames have specifig frame length (0, 1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 20, 24, 32, 48, 64). This function "rounds" up a given length to the next valid CAN-FD frame length. Reviewed-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210111141930.693847-10-mkl@xxxxxxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- include/linux/can/length.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/can/length.h b/include/linux/can/length.h index 156b9d17969a..b2313b2a0b02 100644 --- a/include/linux/can/length.h +++ b/include/linux/can/length.h @@ -45,4 +45,10 @@ u8 can_fd_dlc2len(u8 dlc); /* map the sanitized data length to an appropriate data length code */ u8 can_fd_len2dlc(u8 len); +/* map the data length to an appropriate data link layer length */ +static inline u8 canfd_sanitize_len(u8 len) +{ + return can_fd_dlc2len(can_fd_len2dlc(len)); +} + #endif /* !_CAN_LENGTH_H */ -- 2.29.2
